| 引用本文: | 梁川,李莉,孟彤彤.河西内陆区玉米膜下滴灌高效节水供水供肥模式研究[J].灌溉排水学报,0,():-. |
| Liangchuan,Lili,Mengtongtong.河西内陆区玉米膜下滴灌高效节水供水供肥模式研究[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】提高河西干旱内陆区水资源的利用效率、合理控制化肥施用量，减少土壤化肥污染、提高农业生产效益,开展膜下滴灌玉米水肥田间试验。【方法】利用回归分析方法，构建膜下滴灌玉米产量与灌水量、施肥量的水肥生产函数模型，模型具有较强的适用性和预测能力。【结果】由模型可确定河西内陆区玉米膜下滴灌较适宜的灌溉定额及施肥量，同时得出水、肥两因子都具有增产效应，同时也存在边际效应，水肥偶合效应表现为水肥对产量的互作负效应，随着灌水量、施肥量的增加，不仅会增加生产成本，而且会导致产量下降。【结论】适宜河西内陆区玉米膜下滴灌的灌溉定额为4200mm/hm2 ，施肥量为600kg/hm2。 |
| 关键词: 河西内陆区;玉米;产量构成因素;水肥生产函数;边际效应 |
| DOI： |
| 分类号:期刊 |
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| Study on efficient water and fertilizer supply model of corn mulching drip irrigation in inland area of hexi |
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Liangchuan, Lili, Mengtongtong
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Gansu water conservancy Research Institute
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| Abstract: |
| Abstract:【Background】Based on the national food safety and technology requirements of the national water resources strategic security, combining national "much starker choices-and graver consequences-in" and the ministry of agriculture, reduce fertilizer use, realize the goal of fertiliser use zero growth, soil testing fertilization, precision fertilization, cucumber, characteristic of agricultural production, construction of high yield, high quality, high efficiency, low consumption, safety and ecological agriculture.Corn is not only a major grain crop, but also a water-intensive crop. In 2015, the cultivated area in hexi inland region of gansu province reached 13.86 million mu, accounting for 22.4% of the sown area.In the actual production process, the irrigation and fertilization of field crops are generally applied by farmers according to experience, which makes the amount of irrigation and fertilizer more random.The key to solving this problem is to study the water-fertilizer - crop yield relationship (crop water-fertilizer production function).Therefore, in the hexi inland area of planting corn as the research object, research of membrane with drip irrigation of corn the influence of different level on yield and water components, put forward under drip irrigation in hexi inland area of corn membrane efficient water saving water supply mode, for food production in hexi area precipitation weight to provide certain theoretical basis and technical support, fundamentally solve the contradiction between ecological environment and agricultural sustainable development, has great social significance.【Objective】The Objective is improve the utilization efficiency of water resources, control the application amount of chemical fertilizer reasonably, reduce the pollution of soil chemical fertilizer and improve the agricultural production efficiency in the arid inland area of Hexi, The field experiment of corn water and fertilizer under film drip irrigation was carried out. 【Method】Using the regression analysis method, the water and fertilizer production function model of corn yield, irrigation amount and fertilization amount under mulch drip irrigation was constructed, which has strong applicability and prediction ability. 【Result】The model can be used to determine the appropriate irrigation quota and fertilizer application amount of corn film drip irrigation in Hexi inland area. The Result is two factors of water and fertilizer have the effect of increasing production, but also have the marginal effect. The coupling effect of water and fertilizer is shown as the negative effect of water and Fertilizer on production. With the increase of water and fertilizer application amount, not only the production cost will be increased, but also the output will be decreased. 【Conclusion】The irrigation quota of drip irrigation under film in suitable inland area of hexi is 4200mm/hm2 , and the fertilizer application rate is 600kg/hm2. |
| Key words: Hexi inland area;Corn;Yield components;Water and fertilizer production function;Marginal effect |
